81397300

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{19853}}^1$

素因数の和:19908

約数の個数: 36

約数和(自身を含む): 180949356

約数和(自身を除く): 99552056

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 164, 205, 410, 820, 1025, 2050, 4100, 19853, 39706, 79412, 99265, 198530, 397060, 496325, 813973, 992650, 1627946, 1985300, 3255892, 4069865, 8139730, 16279460, 20349325, 40698650, 81397300]

約数ペア:

[(1, 81397300), (2, 40698650), (4, 20349325), (5, 16279460), (10, 8139730), (20, 4069865), (25, 3255892), (41, 1985300), (50, 1627946), (82, 992650), (100, 813973), (164, 496325), (205, 397060), (410, 198530), (820, 99265), (1025, 79412), (2050, 39706), (4100, 19853)]